Egidijus Kamarauskas
Vilnius University
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Publication
Featured researches published by Egidijus Kamarauskas.
Chemistry-an Asian Journal | 2017
Artiom Magomedov; Nobuya Sakai; Egidijus Kamarauskas; Gabrielė Jokubauskaitė; Marius Franckevičius; Vygintas Jankauskas; Henry J. Snaith; Vytautas Getautis
Perovskite solar cells are considered a promising technology for solar-energy conversion, with power conversion efficiencies currently exceeding 20 %. In most of the reported devices, Spiro-OMeTAD is used for positive-charge extraction and transport layer. Although a number of alternative hole-transporting materials with different aromatic or heteroaromatic fragments have already been synthesized, a cheap and well-performing hole-transporting material is still in high demand. In this work, a two-step synthesis of a carbazole-based hole-transporting material is presented. Synthesized compounds exhibited amorphous nature, good solubility and thermal stability. The perovskite solar cells employing the newly synthesized material generated a power conversion efficiency of 16.5 % which is slightly lower than that obtained with Spiro-OMeTAD (17.5 %). The low-cost synthesis and high performance makes our hole-transport material promising for applications in perovskite-based optoelectronic devices.
Chemistry-an Asian Journal | 2016
Titas Braukyla; Nobuya Sakai; Maryte Daskeviciene; Vygintas Jankauskas; Egidijus Kamarauskas; Tadas Malinauskas; Henry J. Snaith; Vytautas Getautis
V-shaped Trögers base core has been investigated as a central linking unit in the synthesis of new charge-transporting materials for optoelectronic applications. The studied molecules have been synthesized in two steps from relatively inexpensive starting materials, and demonstrate high glass transition temperatures, good stability of the amorphous state, and comparatively high hole drift mobility (up to 0.011 cm(2) V(-1) s(-1) ).
RSC Advances | 2015
Valentas Gaidelis; Egidijus Kamarauskas; Tadas Malinauskas; Vytautas Getautis; Robert Send; Henrike Wonneberger; Ingmar Bruder
The energy levels of new metal-free organic dyes for dye-sensitized solar cells have been investigated by the photoemission in air, UV-Vis absorption and cyclic voltammetry methods in the solutions of the dye molecules, in films of the pure dyes and in the dyes adsorbed on nanoporous TiO2. Significant differences of the energy levels have been found depending on the dye environment. For the best level of tuning in a solar cell, the energy levels are to be determined for the dyes adsorbed on the TiO2 surface. The absorbed photon conversion to current efficiency (APCE) of the solar cells was evaluated and compared with the incident photon quantum efficiency (IPCE). The results obtained show that the IPCE is dependent on the light quanta energy and reaches a maximum value when the light quanta energy is about 0.3 eV higher than the light absorption threshold.
Journal of the American Chemical Society | 2015
Kasparas Rakstys; Antonio Abate; M. Ibrahim Dar; Peng Gao; Vygintas Jankauskas; G. Jacopin; Egidijus Kamarauskas; Samrana Kazim; Shahzada Ahmad; Michael Grätzel; Mohammad Khaja Nazeeruddin
Angewandte Chemie | 2016
Kasparas Rakstys; Michael Saliba; Peng Gao; Paul Gratia; Egidijus Kamarauskas; Sanghyun Paek; Vygintas Jankauskas; Mohammad Khaja Nazeeruddin
Tetrahedron | 2012
Aurimas Bieliauskas; Vytas Martynaitis; Vytautas Getautis; Tadas Malinauskas; Vygintas Jankauskas; Egidijus Kamarauskas; Wolfgang Holzer; Algirdas Šačkus
Dyes and Pigments | 2014
E. Zaleckas; Raimonda Griniene; B. Stulpinaite; J.V. Grazulevicius; L. Liu; Zhigang Xie; Ewa Schab-Balcerzak; Egidijus Kamarauskas; B. Zhang; S. Grigalevicius
Synthetic Metals | 2013
Aurimas Bieliauskas; Vytautas Getautis; Vytas Martynaitis; Vygintas Jankauskas; Egidijus Kamarauskas; Sonata Krikštolaitytė; Algirdas Šačkus
Advanced Functional Materials | 2018
Artiom Magomedov; Sanghyun Paek; Paul Gratia; Ernestas Kasparavicius; Maryte Daskeviciene; Egidijus Kamarauskas; Alytis Gruodis; Vygintas Jankauskas; Kristina Kantminiene; Kyung Taek Cho; Kasparas Rakstys; Tadas Malinauskas; Vytautas Getautis; Mohammad Khaja Nazeeruddin
Dyes and Pigments | 2017
Simona Urnikaite; Titas Braukyla; Artiom Magomedov; Egidijus Kamarauskas; Tadas Malinauskas; Vytautas Getautis